[PATCH v4 69/80] drm/panel: panel-dsi-cm: add panel database to driver
Laurent Pinchart
laurent.pinchart at ideasonboard.com
Tue Dec 1 00:23:54 UTC 2020
Hi Tomi,
Thank you for the patch.
On Tue, Nov 24, 2020 at 02:45:27PM +0200, Tomi Valkeinen wrote:
> Add a panel database to the driver instead of reading propertes from DT
> data. This is similar to panel-simple, and I believe it's more future
> safe way to handle the panels.
No need to care about backward compatibility ?
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen at ti.com>
> ---
> drivers/gpu/drm/panel/panel-dsi-cm.c | 107 +++++++++++++++++----------
> 1 file changed, 69 insertions(+), 38 deletions(-)
>
> diff --git a/drivers/gpu/drm/panel/panel-dsi-cm.c b/drivers/gpu/drm/panel/panel-dsi-cm.c
> index c17ed728c695..ec87b785871f 100644
> --- a/drivers/gpu/drm/panel/panel-dsi-cm.c
> +++ b/drivers/gpu/drm/panel/panel-dsi-cm.c
> @@ -22,10 +22,7 @@
> #include <drm/drm_modes.h>
> #include <drm/drm_panel.h>
>
> -#include <video/display_timing.h>
> #include <video/mipi_display.h>
> -#include <video/of_display_timing.h>
> -#include <video/videomode.h>
>
> #define DCS_GET_ID1 0xda
> #define DCS_GET_ID2 0xdb
> @@ -33,6 +30,18 @@
>
> #define DCS_REGULATOR_SUPPLY_NUM 2
>
> +static const struct of_device_id dsicm_of_match[];
> +
> +struct dsic_panel_data {
> + u32 xres;
> + u32 yres;
> + u32 refresh;
> + u32 width_mm;
> + u32 height_mm;
> + u32 max_hs_rate;
> + u32 max_lp_rate;
> +};
> +
> struct panel_drv_data {
> struct mipi_dsi_device *dsi;
> struct drm_panel panel;
> @@ -48,16 +57,14 @@ struct panel_drv_data {
> */
> unsigned long hw_guard_wait; /* max guard time in jiffies */
>
> - /* panel HW configuration from DT or platform data */
> + const struct dsic_panel_data *panel_data;
> +
> struct gpio_desc *reset_gpio;
>
> struct regulator_bulk_data supplies[DCS_REGULATOR_SUPPLY_NUM];
>
> bool use_dsi_backlight;
>
> - int width_mm;
> - int height_mm;
> -
> /* runtime variables */
> bool enabled;
>
> @@ -455,11 +462,8 @@ static int dsicm_get_modes(struct drm_panel *panel,
> return -ENOMEM;
> }
>
> - drm_mode_set_name(mode);
> - mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
> -
> - connector->display_info.width_mm = ddata->width_mm;
> - connector->display_info.height_mm = ddata->height_mm;
> + connector->display_info.width_mm = ddata->panel_data->width_mm;
> + connector->display_info.height_mm = ddata->panel_data->height_mm;
>
> drm_mode_probed_add(connector, mode);
>
> @@ -476,15 +480,10 @@ static const struct drm_panel_funcs dsicm_panel_funcs = {
>
> static int dsicm_probe_of(struct mipi_dsi_device *dsi)
> {
> - struct device_node *node = dsi->dev.of_node;
> struct backlight_device *backlight;
> struct panel_drv_data *ddata = mipi_dsi_get_drvdata(dsi);
> - struct display_timing timing;
> - struct videomode vm = {
> - .hactive = 864,
> - .vactive = 480,
> - };
> int err;
> + struct drm_display_mode *mode = &ddata->mode;
>
> ddata->reset_gpio = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
> if (IS_ERR(ddata->reset_gpio)) {
> @@ -493,23 +492,16 @@ static int dsicm_probe_of(struct mipi_dsi_device *dsi)
> return err;
> }
>
> - err = of_get_display_timing(node, "panel-timing", &timing);
> - if (!err) {
> - videomode_from_timing(&timing, &vm);
> - } else {
> - dev_warn(&dsi->dev,
> - "failed to get video timing, using defaults\n");
> - }
> -
> - if (!vm.pixelclock)
> - vm.pixelclock = vm.hactive * vm.vactive * 60;
> - drm_display_mode_from_videomode(&vm, &ddata->mode);
> -
> - ddata->width_mm = 0;
> - of_property_read_u32(node, "width-mm", &ddata->width_mm);
> -
> - ddata->height_mm = 0;
> - of_property_read_u32(node, "height-mm", &ddata->height_mm);
> + mode->hdisplay = mode->hsync_start = mode->hsync_end = mode->htotal =
> + ddata->panel_data->xres;
> + mode->vdisplay = mode->vsync_start = mode->vsync_end = mode->vtotal =
> + ddata->panel_data->yres;
> + mode->clock = ddata->panel_data->xres * ddata->panel_data->yres *
> + ddata->panel_data->refresh / 1000;
> + mode->width_mm = ddata->panel_data->width_mm;
> + mode->height_mm = ddata->panel_data->height_mm;
> + mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
> + drm_mode_set_name(mode);
>
> ddata->supplies[0].supply = "vpnl";
> ddata->supplies[1].supply = "vddi";
> @@ -536,6 +528,7 @@ static int dsicm_probe(struct mipi_dsi_device *dsi)
> struct panel_drv_data *ddata;
> struct backlight_device *bldev = NULL;
> struct device *dev = &dsi->dev;
> + const struct of_device_id *id;
> int r;
>
> dev_dbg(dev, "probe\n");
> @@ -547,6 +540,12 @@ static int dsicm_probe(struct mipi_dsi_device *dsi)
> mipi_dsi_set_drvdata(dsi, ddata);
> ddata->dsi = dsi;
>
> + id = of_match_node(dsicm_of_match, dev->of_node);
> + if (!id)
> + return -ENODEV;
> +
> + ddata->panel_data = id->data;
> +
> r = dsicm_probe_of(dsi);
> if (r)
> return r;
> @@ -583,8 +582,8 @@ static int dsicm_probe(struct mipi_dsi_device *dsi)
> dsi->format = MIPI_DSI_FMT_RGB888;
> dsi->mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS |
> MIPI_DSI_MODE_EOT_PACKET;
> - dsi->hs_rate = 300000000;
> - dsi->lp_rate = 10000000;
> + dsi->hs_rate = ddata->panel_data->max_hs_rate;
> + dsi->lp_rate = ddata->panel_data->max_lp_rate;
>
> drm_panel_add(&ddata->panel);
>
> @@ -622,8 +621,40 @@ static int dsicm_remove(struct mipi_dsi_device *dsi)
> return 0;
> }
>
> +static const struct dsic_panel_data taal_data = {
> + .xres = 864,
> + .yres = 480,
> + .refresh = 60,
> + .width_mm = 0,
> + .height_mm = 0,
> + .max_hs_rate = 300000000,
> + .max_lp_rate = 10000000,
> +};
> +
> +static const struct dsic_panel_data himalaya_data = {
> + .xres = 480,
> + .yres = 864,
> + .refresh = 60,
> + .width_mm = 49,
> + .height_mm = 88,
> + .max_hs_rate = 300000000,
> + .max_lp_rate = 10000000,
> +};
> +
> +static const struct dsic_panel_data droid4_data = {
> + .xres = 540,
> + .yres = 960,
> + .refresh = 60,
> + .width_mm = 50,
> + .height_mm = 89,
> + .max_hs_rate = 300000000,
> + .max_lp_rate = 10000000,
> +};
> +
> static const struct of_device_id dsicm_of_match[] = {
> - { .compatible = "panel-dsi-cm", },
> + { .compatible = "tpo,taal", .data = &taal_data },
> + { .compatible = "nokia,himalaya", &himalaya_data },
> + { .compatible = "motorola,droid4-panel", &droid4_data },
> {},
> };
>
--
Regards,
Laurent Pinchart
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